We had a question about and entry in the SOA (Start of Authority) field in the DNS record of our VMs. In the properties of the SOA record, you will notice an entry in the Responsible Person field. It is also visible in the Forward Lookup Zone in the Data filed of the SOA record. It is the email address of the person that problems should be reported to. The “@” symbol is not used because “@” is also used in the zone file. That is why it appears as hostmaster.domain.com.